

package com.hazelcast.client.impl.protocol.task;

import com.hazelcast.client.impl.protocol.ClientMessage;
import com.hazelcast.client.impl.protocol.codec.ClientAddPartitionLostListenerCodec;
import com.hazelcast.cluster.Address;
import com.hazelcast.cluster.impl.MemberImpl;
import com.hazelcast.instance.impl.Node;
import com.hazelcast.internal.cluster.ClusterService;
import com.hazelcast.internal.cluster.impl.ClusterServiceImpl;
import com.hazelcast.internal.nio.Connection;
import com.hazelcast.internal.partition.IPartitionService;
import com.hazelcast.partition.PartitionLostListener;

import java.security.Permission;
import java.util.UUID;
import java.util.concurrent.CompletableFuture;

import static com.hazelcast.internal.partition.InternalPartitionService.PARTITION_LOST_EVENT_TOPIC;
import static com.hazelcast.spi.impl.InternalCompletableFuture.newCompletedFuture;

public class AddPartitionLostListenerMessageTask extends AbstractAddListenerMessageTask<Boolean> {

    public AddPartitionLostListenerMessageTask(ClientMessage clientMessage, Node node, Connection connection) {
        super(clientMessage, node, connection);
    }

    @Override
    protected CompletableFuture<UUID> processInternal() {
        final IPartitionService partitionService = getService(getServiceName());

        final PartitionLostListener listener = event -> {
            if (endpoint.isAlive()) {
                ClusterService clusterService = getService(ClusterServiceImpl.SERVICE_NAME);
                Address eventSource = event.getEventSource();
                MemberImpl member = clusterService.getMember(eventSource);
                ClientMessage eventMessage = ClientAddPartitionLostListenerCodec.encodePartitionLostEvent(event.getPartitionId(), event.getLostBackupCount(), member.getUuid());
                sendClientMessage(null, eventMessage);
            }
        };

        if (parameters) {
            return newCompletedFuture(partitionService.addLocalPartitionLostListener(listener));
        }

        return partitionService.addPartitionLostListenerAsync(listener);
    }

    @Override
    protected Boolean decodeClientMessage(ClientMessage clientMessage) {
        return ClientAddPartitionLostListenerCodec.decodeRequest(clientMessage);
    }

    @Override
    protected ClientMessage encodeResponse(Object response) {
        return ClientAddPartitionLostListenerCodec.encodeResponse((UUID) response);
    }

    @Override
    public String getServiceName() {
        return IPartitionService.SERVICE_NAME;
    }

    @Override
    public Permission getRequiredPermission() {
        return null;
    }

    @Override
    public String getDistributedObjectName() {
        return PARTITION_LOST_EVENT_TOPIC;
    }

    @Override
    public String getMethodName() {
        return "addPartitionLostListener";
    }

    @Override
    public Object[] getParameters() {
        return null;
    }

    @Override
    protected String getUserCodeNamespace() {
        // Default Namespace
        return null;
    }
}
